Fast view-specific generation of high-definition holograms with enhanced quality.

Holography is often considered as the most promising immersive technology because it provides all the depth cues of the human visual system. Some limitations still need to be overcome such as the huge computational load of high-definition holograms and the noise introduced in the reconstructed scene during the quantization process. In this paper, we propose what we believe is a novel view-specific layer-based stereogram approach combined with a view-dependent error diffusion algorithm that aims to solve those limitations.

Exploring Facial Thermography Patterns in Women with Chronic Migraine.

(1) Background: Chronic migraine is a debilitating neurological condition affecting millions worldwide. This study delves into the facial point-of-care (POC) thermographic patterns of women with chronic migraine, aiming to shed light on the condition's pathophysiology and diagnostic potential. (2) Methods: Using infrared POC thermography, the facial temperature distribution of 24 female participants with chronic migraine were analyzed.

Head-Mounted Miniature Motorized Camera and Laser Pointer Driven by Eye Movements.

Recording a video scene as seen by an observer, materializing where is focused his visual attention and allowing an external person to point at a given object in this scene, could be beneficial for various applications such as medical education or remote training. Such a versatile device, although tested at the experimental laboratory demonstrator stage, has never been integrated in a compact and portable way in a real environment. In this context, we built a low-cost, light-weight, head-mounted device integrating a miniature camera and a laser pointer that can be remotely controlled or servo-controlled by an eye tracker.

Spectral and spatial characterization of perfluorinated graded-index polymer optical fibers for the distribution of optical wireless communication cells.

In this paper, the characterization of a perfluorinated graded-index polymer optical fiber (PF-GIPOF) for a high-bitrate indoor optical wireless system is reported. PF-GIPOF is used here to interconnect different optical wireless access points that distribute optical free-space high-bitrate wireless communication cells. The PF-GIPOF channel is first studied in terms of transmission attenuation and frequency response and, in a second step, the spatial power profile distribution at the fiber output is analyzed.

Uniform free-space cell shaping using diffractive-type beam diffusers for optical wireless links.

This Letter presents the design of a diffractive beam diffuser to homogenize the irradiance within optical free-space cells generated from multimode fibers in an indoor high-speed network environment. Native speckled beams with a Gaussian envelope are transformed into circular flat-top distributions to guarantee a constant signal-to-noise ratio at the wireless receiving stage. Design considerations followed by the device fabrication and test results are given, showing its ability to shape narrow line-of-sight optical wireless cells operating at the Gbps range.